Projection apparatus.



No. 864,418. I r f PATENTED AUG. 27, 1907. J E. w. eoonmon, PROJECTIONAPPARATUS.

APPLIOATION TILED DEG. 5. 1906;

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No. 864,418. PATENTED AUG. 2'7, 1907.

E. W. GOODRIGH. PROJECTION APPARATUS.

APPLIUATIDN FILED 1330.5, 1906.

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Wig/5 N0 864,418. PATENTED AUG. 2'7, 1907.

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PROJECTION APPARATUS. APPLICATION FILED DBO. s; 1906.

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EMORY wv ooo'nnron, F SOMEBVILLE, MASSACHUSETTS.

PROJECTION APPARATUS.

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Specification of Letters Patent.

- Patented Aug. 27, 1907.

Application filed December ii, 1906- Serial No. 346,332.

'To' all whom it may concern:

Be it known that I, EnoRY W. Goomuon, a citizen.

' of the United States, residing at Somervi1le,fcounty of drawingrepresenting like parts- Middlesex, and State of Massachusetts, haveinvented an Improvement in ProjectionfApparatus, of which the followingdescription, in connection witlp the accompanying drawing, .s aspecification,- like letters on the' This invention relates toprojection apparatus and especially to apparatus adapted ,for eithertransparent projection work or opaque projection work, and the object ofthe invention is to provides. novel apparatus of this character whichcan be easilyand quic'kly' transformed from an opaqueprojectionapparatus to a transparent projection apparatus or vice versa;and also to provide an apparatus in which the opaque-obj set may besupported in a horizontal position.

In the embodiment of the invention herein illustrated, I have shown tworeflectors, oneof which is used to reflect the light emanating from theilluniined opaque object toward the objective when the device is used asan opaque projection apparatus, and the. other of which reflects thebeam of light toward the objective and through the transparency when thedevice is used as a transparent projection apparatus. The latter mir roris supported by the object-supporting table on which the opaque objectsare adapted to rest, and when the device is used as an opaque projectionapparatus, said mirror may be folded back out of the way; while whenthe-device is to be used'as a transparent a projection apparatus themirror may be thrown up into the proper position to reflect the beam oflight toward the objective. The object-supporting table" is also madeadjustable so that different sized objects may be supported thereon.Lhave also shown two objectives, one folgiise when the apparatus is usedas a transparent proje'ctidn apparatus, and the other to be used whenthe apparatus is to be used as anopaque projection apthereof will bemore specifically described and th en pointodout in the appended claims.

Referring now to the drawings wherein I have show one apparatusembodying my invention, Figure 1 is a vertical section through theapparatus when'it is'adjusted for opaque projection; Fig. 2 is ahorizontal section on substantially the line M, Fig. 1, down.

Fig. 3 is a partial sectionshowing the apparatus as ad justed fortransparent projection; Fig.1 4 is a section on the line yy, Fig. 1. i

The lamp 1 is herein shown as an ordinary arc lamp,

but it might be a lamp or light of any suitable character withoutdeparting from my invention. It is supported in a lamp-chamber 2 and thelight rays einanat-' ing therefio'ih are collimated into a beam 4 by acondensing lens-dot any suitable or usual construction.

This beam of'rays 4 is thrown either on to the opaque object forilluminating itor on toa reflector which reflec ts it toward andthrough'the' transparent object according as thejapparatus is used foropaque or transparent projection. The aopaque objectj'is supported on anobject-supporting table 5, which is herein shown as supported by an arm"B which is pivoted to the base 7 asst 8. The table 5'is preferablypivoted to the arm '6, as at 9, so that said table 5' be maintained inits horizontal position in everyposition of the arm, as

shownlin dotted lines Fig.1. Said table is normally held in thefulllineposition Fig. l by means of a suitablespringlOD I Situated above the"table 5 within the housingdZ is a reflecting surface 13 which may be amirror or any other suitable reflectorand which is arranged to reflectthe light m thatareradiated from the object 11 toward the objective 14which may be of any suitable construction and which is arranged toproject the reflected image on to the screen.- The object which isprojected, therefore, is in fact the refiection of theobject in themirror'l3. The object ll'lnay belaid directly onthe table 5 or maybesupported in a suitable holder 15 which rests on said table. By mountingthe table on'th epivoted'arm 6, said table may be raised or loweredtoaccommodate'objects of different thick- 7 I ness and different sizeswithout carrying the face of the object out of line'with the beam ofrays 4. The table is preiorablyprovided on its under side with asuitable handle 16 by means oi which it may be raised and loweredand'maintained in its proper horizontal position. p i i Supported on thetable o is another reflector 17 which. may be a mirror or any otherreflecting surface which is adapted to be thrown into operative positionwhen the apparatus is converted into a transparent projec-- tionapparatus, as shown in Rig. 3. 'In the present embodiment ofmy'invention this reflector 17 is received in a recess 18' formed in thetable'fi and is covered by the object 11 when the device is us'edfor Vopaque projection. When, however, 'the apparatus is to be used for.transparent projection work, the holder 15 is removed and the reflector17 is swung into substantially the position shown in Fig. 3, position itstands inthe path of and reflects the beam! toward-the .objective, andthrough the transparency carried in a suitable holder 19. I prefer touse two objectives 21 and 14, one for transparent projection work andthe other for opaque projection work, and to mount these objectives sothat either one may be upon a slide which can be moved toward and fromthe holder 20, said objective being connected with the holder by meansof a bellows 26. A

' Any suitable means may be employed for holding the mirror 17 initsadjusted position, and one conven- 20 ient way of accomplishing thisis 'by pivoting the mirror to the table 5 and making the pivotedconnection such that said mirror will be frictionally held in anyadjusted position. As herein shown the pivotal pin 49 .of the mirror 17has a friction member 50 thereon '2 5 against which bears a spring 51,the friction generated between-the spring and friction member beingsufficient to hold the mirror in any adjusted position. The pivotal .pin49 is preferably extended beyond the table and provided with athumb-piece 27 by which the po-' 30 sition of the mirrormay be adjusted.I

' In order to make the apparatus as compact as possible lprefqrablyarrange the lamp-chamberZ over the objectives and so place thecondensing lens 3 that the beam 4 is directed obliquely on to the table5. In the embodiment of the invention herein illustrated the beam 4extends substantially'paiallel to the reflector 13. I have shown thelight 1 as received within a house ing or casing 28 which in turn isreceived-within the.

lamp chamber-2 and preferably the space between the 40 Housing and thewalls of the lamp-chamber 2 are packed-with some non-heat-conductingmaterial 29 so as to prevent the heat generated by the lamp frominjuring the material of the casing. I have found for this pulpose thatventilated asbestos packing is satisfactory in every way.

30 designates the chimpey through which the hot air and products ofcombustion escape.

An apparatus constructed as herein shown is very compact in itsconstruction and can be readily and.

quickly changed from opaque to transparent projection. Further the table5 for supporting the opaque projection is always in horizontal position,and as a result this apparatus can be used to'project the image ofopaque projections of any character. Many opaque projection apparatusare so constructed that the opaque object is held in a verticalposition, but with apparatus of this type it is not possible to projectimages of such opaque objects as cannot be turned out of a hori- 1 thelight rays radiating from'ftheilluriiined -objeet.

' tion, and a fixed reflector situated to reflect the light r flectorhinged to the table and'adapted to odcupypeither iixed reflector toreflect light rays radiating from an illuzontal position withoutdestroying or disarranging the view which it is desired to project. p pI have herein shown one embodiment only Of 'frny invention, andtherefore the invention is not-limited to the precise detailsillustrated. 5 i Having fully described myinvention, what I la m as newand desire tosecure by Letters Patent T 1. In a projection'apparatus,'the'colpbination with an objectsupporting table, of means to prodiiceaibeam of light and project it directly onto said table, an objective,"and a reflector in position to reflect toward'thej objective .70 2. In aprojection apparatus, means for producing a beam oi: light, a horizontalobject-supporting table having an angular relation to said beam, anobjective, -an l'-a. re flector in a plane substantially parallel to thebeam of light to reflect the light rays radiating from'theillumlnedobject toward the objective. T '3. In a projection apparatus,the combination with an object-supporting table of means to direct abeam of light toward said table, two movably mounted-objectives eitherone of which .may be moved into'operative position. a reflectoradjustably carried by-the table to' reflect the beam toward oneobjective when it is in operatlv'e po diated irom the illumined objecttoward the other ob-f jective when the latter is in operative position.I

4. In aprojection apparatus, thecomblnation with an object-supportingtable having a-recess of means to direct a beam of llghttoward thetable,an objective,. and an adjustable'refiector normally. occupying said.recess but adapted to be moved into position toreflect the beam oflighttoward the objective. Y 8

5. In a projection apparatus, the combination with a horizontalobject-supportingtable, means to direct a. lieam oflight toward saidtable, two movable objectives either j of which'maybe brought intooperatlye'position, ante a position parallel with the top of the or aposition to reflect the beam of light toward the operative objerm, and afixed reflectorto reflect light rays radiating. from an illumined objectsupported by the tableto wa'rd the operative objective. 5 I K I f V 6.In a projection ,apparatus, the conibinhti'on with a casing of ahorizontal object-supporting table, an-arm pivoted to said table andalso to the casing, means to. direct a beam of light toward the table,-an objective, and of" mined object carried by the table toward theobjective.

7. In a projection apparatus,'the coinbination with a horizontalvertically-adjustable table, otj means for pro; ducing a beam of lightand projecting it directly onto said table} an objective, and areflector in position .to reflect toward the objective light raysradiatingjrom an illurnined object 'on the table.

8. In a projection apparatus, the combination with a horizontalvertically-adjustable table ofmeans to direct a. beam of light towardsaid table, two movably mounted objectives either one of which may bemoved intq operative position, a reflector adjustably carried by thetable to reiiectthe beam toward one objective when it is in operative Iposition, and a fixed reflector situated to reflectihe light radiatedfrom the illumined object toward the o'ther ob jective when the latteris in operative position l.'

In testimony whereof, I have signed my name; to this' specification,in-' the presence of two subscrlbingwitnesses EMORY W. GOODRICH.

Witnesses: I

Louis C. SMITH, BERTHA E. Hnusnn.

